#include <stdio.h>
#include <stdlib.h>
size_t size = 1024*1024*1024;
int main(){
		// char large_str[size];
		char * large_str;
		large_str = (char *) malloc(size);
		for(size_t i=0; i<size; i++) large_str[i]='z';
		large_str[0]='z';
		large_str[size-1]='a';
		printf("%s",large_str);
		getchar();
		return 0;
}
